CVE-2025-27219
MEDIUM5.8EPSS 0.32%CGI has Denial of Service (DoS) potential in Cookie.parse
Published: 3/3/2025Modified: 11/19/2025
Description
In the CGI gem before 0.4.2 for Ruby, the CGI::Cookie.parse method in the CGI library contains a potential Denial of Service (DoS) vulnerability. The method does not impose any limit on the length of the raw cookie value it processes. This oversight can lead to excessive resource consumption when parsing extremely large cookies.
Affected packages (7)
- Alpine/rubyfrom 0, < 3.2.8-r0
- Alpine/ruby-net-imapfrom 0, < 0.3.9-r0
- Debian/ruby2.7from 0, < 2.7.4-1+deb11u5
- Debian/ruby2.7from 0, < 2.7.4-1+deb11u5
- Debian/ruby3.1from 0
- Debian/ruby3.3from 0, < 3.3.7-2
- RubyGems/cgifrom 0, < 0.3.5.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N |
| osv | CVSS 3.1 | MEDIUM5.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L |
References (11)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2025-27219
- ADVISORYhttps://security.alpinelinux.org/vuln/CVE-2025-27219
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2025-27219
- PATCHhttps://github.com/ruby/cgi
- WEBhttps://github.com/ruby/cgi/pull/52
- WEBhttps://github.com/ruby/cgi/pull/53
- WEBhttps://github.com/ruby/cgi/pull/54
- WEBhttps://github.com/rubysec/ruby-advisory-db/blob/master/gems/cgi/CVE-2025-27219.yml
- WEBhttps://hackerone.com/reports/2936778
- WEBhttps://lists.debian.org/debian-lts-announce/2025/03/msg00008.html
- WEBhttps://www.cve.org/CVERecord?id=CVE-2025-27219